Filmscanners mailing list archive (filmscanners@halftone.co.uk)
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Re: filmscanners: HP Scanner (was:Fast, decent (if you are lucky), low res scans
Lynn Allen wrote:
> Thanks, Ed. Any ideas on how to *clean* that sucker? I'm not sure I even
> know what it looks like (although there's a wide white stripe at the top of
> the scanning unit).
>
>
Flatbed scanners often have a calibration zone that is glued onto the
underside of the top of the scanner, at the "top" edge of the scanner
area (the area where the scan bar starts scanning). Sometimes they have
fine black and white stripes. You can't see it without removal of the
top of the scanner. If this bar gets damaged, spotted, yellowed or
marked, the individual CCD sensors can be mis-calibrated within that area.
Art
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